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Software Dev Principal Engineer - Deep Packet Inspection - DPI*

SonicWall

2 - 5 years

Bengaluru

Posted: 05/01/2026

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Job Description

SonicWall is a cybersecurity forerunner with more than 30 years of expertise and is recognized as a leading partner-first company, ensuring our partners and their customers are never alone in the fight against cybercrime. With the ability to build, scale and manage security across the cloud, hybrid and traditional environments in real-time, SonicWall provides relentless security against the most evasive cyberattacks across endless exposure points for increasingly remote, mobile and cloud-enabled users. With its own threat research center, SonicWall can quickly and economically provide purpose-built security solutions to enable any organizationenterprise, government agencies and SMBsaround the world. For more information, visit or follow us on Twitter , LinkedIn , Facebook and Instagram .


SonicWall is commencing a new chapter in history with an exciting lineup of network security products, and we want the best people to be part of our team. We are in a dynamic phase operating as an independent private company after Francisco Partners, a leading global private equity firm, acquired SonicWall from Dell. The Software Engineering position provides challenging opportunities with a cohesive world-class team in our fast-paced, dynamic and fulfilling work environment!


Deep Packet Inspection - Intrusion Prevention and Gateway Anti-Virus - Principal Software Engineer


Responsibilities

  • Design and enhance SonicWall Reassembly - Free Deep Packet Inspection (DPI) engine.
  • Design and implement Intrusion Prevention, Gateway Anti-Virus, and other related features of SonicWall's Next Generation firewall.
  • Design and implement SonicOS Capture ATP (malware sandboxing) features.
  • Maintain and document code using source control systems and other tools.


Requirements

  • 10+ years of experience with a Bachelors, Masters or PhD or equivalent experience. Post -Graduate Degree holders are preferred and encouraged to apply.


Must Haves

  • Fluent in C and in coding various data structures and algorithms in C.
  • Solid background in TCP/IP networking.
  • Strong background in either Unix OR Linux systems.
  • Persuasive written and verbal communication (includes critical reading, listening, and reasoning).
  • Creative problem solving, software testing, and debugging capabilities.
  • Be a self-starter, and motivated to work independently to deliver towards team goals.


Preferred Qualifications

  • Strong Layer 3 through Layer 7 protocol (HTTP, SMTP, POP, IMAP, FTP, TLS, SSH, etc.) knowledge.
  • Experience with firewalls and embedded development environment.
  • Knowledge of pattern matching, or compression algorithms is a plus.
  • Experience working with state machines and computation theory is a plus.


To be successful, you need to be extremely organized, willing to learn, able to multi-task in a high/low volume environment and manage competing priorities.


SonicWall is an equal opportunity employer.

We are committed to creating a diverse environment and are an equal opportunity employer. All qualified applicants receive consideration for employment without regard to race, color, ethnicity, religion, sex, gender, gender identity and expression, sexual orientation, national origin, disability, age, marital status, veteran status, pregnancy, or any other basis prohibited by applicable law.

At SonicWall, we pride ourselves on recruiting a diverse mix of talented people and providing active security solutions in 100+ countries.

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